Concentrator table



July 24, 1928.

1,678,364 A. H. STEBBINS CONCENTRATOR TABLE Filed Jan. 8, 1927 2 Sheets-Sheet 1 //\/l/EN7'OR T WWW; m

ATTORNEY a, if?

July 24, 1928. 1,678,364

7 A. H. STEBBINS CONCENTRATOR TABLE Filed Jan. 8, 1927 2 Sheets-Sheet 2 ATTORNEY Patented July 24, 1928.

UNITED STATES ALBERT H. STEBBI INS, LOS ANGELES, CALIFORNIA.-

CONCENTRATOR TABLE.

Application filed January 8, 1927. Serial No. 159,817.

This invention relates to improvements in mncentrator decks and more particularly to the arrangement of the riflles.

Concentrator decks as constructed heretofore to treat ores or other comminuted materials in the dry state usually have a deck surface that is supported at a transverse inclination, and rifiles which extend diagonally over the deck surface serve to direct the concentrates toward the upper side of the deck while the tailings flow laterally over the rifiles toward the lower side of the deck, and travel of the materials lengthwise of the deck is effected by imparting to the deck a progressive vibratory movement.

lVhile the type of deck just described works very well, it is found that separation of the larger concentrates from the tailings may be expedited by arranging the rifiles approximately lengthwise of the deck rather than diagonally thereof, but unless the diagonal ritlles are employed to work the concentrates up the inclined deck surface, the con-- eentrates are not directed away from the lower or tailing side of the deck.

lilaving in mind the foregoing the resent invention contemplates a novel dec construt-tion whereby rifiles that extend approximately lengthwise of the deck are employed in combination with diagonall disposed rifties, with the result that the high grade concentrates are separated from the tailings more rapidly than heretofore while the diagonall y disposed rifiles work the concentrates ct; away from the lower side of the deck.

One important feature ofthe invention resides in a deck surface having a series of rillies arranged adjacent the upper side of the deck so that they will promote the rapid travel of the concentrates along the deck, and having other riflles positioned upon the remaining portion of the deck at an angle to the first mentioned group of riflles to direct the concentrates up the inclined deck sur- 'iace.

Another featureof the invention resides in a deck casing having that portion of the deck surface lying near the upper side of the deck bent upwardly at an increased angle to increase the slope of the portion of the deck upon which the longitudinally extending riflles are provided.

Still another feature of the invention resides in a deck which is constructed to form a material. confining pan along the lower side of the deck to confine the materials upon the deck surface and to subject them to a panning action under the influence of the vibratory movement imparted to the deck.

The features above mentioned when embodied in a single deck cooperate in'a satisfactory manner to produce an efficient concentrator deck having a wide range of use. For example, it is found that unless the larger concentrates are rapidly separated out of the tailings they are likely to be crowded upwardly above the rillles by the finer concentrates that tend to Work downwardly under the large concentrates. The riffles arranged along the upper side of the deck to 1 advance the high grade values rapidly along the deck, effect the desired prompt separation of the larger values from the tailings and liner values, and in this manner these high grade values are prevented from working down the deck into the pan forming portion of the deck. The concentrates that work downwardly under the tailings in the panning operation are directed up the inclined deck away from the tailings by the in clined rifiles.

Other features of the invention and novel combination of parts in addition to the above Fig. 5 is a view similar toFig. 4 but shows a modified type of deck construction.

The concentrator table and the deckshown in the drawings for the most part may be constructed as usual and it will be noted that the deck frame is shown as mounted upon the carriage 11 which is supported by the concentrator frame for movement back and forth in the direction of its length. I

The concentrator frame may be provided with the uprights 12 to which the longitudinally extending side rails 13 are secured, and the opposite sides of the frame are connected bythe transversely extending brace 14. The carriage '11 may be supported from 22 evasea the concentrator frame for vibratory movement in the direction of its length by the anti-friction balls or rollers which are confined between bearing blocks 16 secured to the supporting frame, and similar hearing blocks 17 secured to the under the carriage 11.

Various means may be employed for parting a vibratory movement to the deck 10 and carriage 11 to advance t re materials lengthwise of the decln and the means shown to this end consists of the spaced operating cables 18 each of which i128 an intermediate portion secured to the under face of the carriage 11 by the clamping clocks 19, and the right-hand end portion or each cable is shown in Fig. l as extending downwardly around a grooved sheave 20 which is rotatably supported by a transversely extending shalt 21 mounted upon the concentrator frame. The portion of each cable l9 wnich extends downwardly from the grooved sheave 20 is secured to a coiled spring The portion of er en cable 18 which ext nds in a left-hand direction from the clamp 19 is looped about a similar grooved sheave 20 supported by a transversely extending shaft 23 and a portion of each c: ble extends from the lower face or the sheave last mentioned about a third grooved sheav 2a which is rotatably mounted upon an eccentric 25, and that portion of each cable which extends from the lower face of the grooved sheave 24: is anchored to the supporting frame at 26. Each eccentric 25 is rigidly secured to the power shaft 27 having the driving pulley 27 The arrangement just described is such that the deck 10 is normally urged in a right-hand direction by the pull exerted upon the cables 18 by the compressed springs 22 and rotation of the power shalt will rotate the eccentrics 25 within the groov d sheaves 24 to more these sheaves bodily in an orbital path to thereby tension and slack oil the portion of each cable 18 engaging a sheave 24. This will serve to pull the deck 10 in a left-hand direction and then release it to move in the right hand direction under the action oi? the springs 22. By varying the strength of the springs 22 a progressive movement of any desired intensity may be imparted to the deck, to advance the mater als lengthwise of the same.

The construction so far described. forms no essential part of the present invention and may be varied as desired.

The deck casing 10 is shown as mounted upon the carriage 11 so that it extends at a transverse inclination and the lower side of th deck is secured to the carriage 11 by the hinges 2 while the upper side of deck is supported in spaced relation to re carriage by the posts :29 having the adjustable nuts shown. Thedeck frame 10 is provided with the material supporting surface 30 to which the materials to be treated may be delivered by the feed hopper 31. dis posed adjacent the left-h nd end of the deck, and the rate at which the materials are delivered to the deck may be :entrolled by adjusting the feed gate Below the materia supporting surface 30 is provided the renal air chamber to which air may be delivered under pressure by the blas an tire discharge end of which is connected by a flexible connection to the hood as leading into the air chamber The general configuration oi the deck may be varied as found desirable but preferably has substantially the configuration shown in land 5 wherein it will be seen that "U deck is relatively wide at its material receiving end and gradually decreases in width towards its right-hand or concentrates discharge end. it the upper s'de of the deck is provided the usual concentrate wall 37 having the bull;- lJlOt'h'S 38 and at the le'lt hand end of the deck is provided the usual inclined wall 39 which extends downw: "d from the teed hopper to the lower side 0i the deck.

As above pointed out it is d construct the ritlixs that the lar files will be quick ailing c .iJ 1

0i the cock. ant cord; nce with th s and advanccc th s is ccc:unplished.v in ace presei rnvention, by proadiaccnt the concenti rely long I it 5 i .s cment or" bein the concentrates will vel re the same under the influence 0" movement. In the rcula 1 shown the high rililes ranged so that they r ope downwart. slightly in the direction in which the ma; rials travel and extend downwardly across the path of deck movemcz will be purer-1t by observing the t r rili'les 4.0 with respect to the broker hri which indicates the direction of dc i ment. 'lhis arrangement of the r while not essential in all emb-c liiuents of the iwcntion, is desirable because when the res are arranged that they extend e path of deck movement the move acre. ;l

men't imptrted to tile deck \ill work the concentrates across the channel termed between a pair of mines A) and :1 mat the rillle at the upper side of the tiitilltlrr so that the concentrates will not of cape orally over the vril'l'le at "the lower side of this channel. 'lhe movenu oi" the concentrates 1 H .i' across a channel ant,

of the channel over the re of the clninnel.

40 having the arrangelIiU - that approach the lower side of the deck up the inclined deck surface towards the con centrate wall. This is accomplished in ac cordance with thepresent invention by pro viding the deck surface 30 with a second set of rillles 41 which extend diagonally over the deck surface as shown so that they direct the concentrates traveling, along the riflles upwardly from the lower side of the deck towards the concentrate wall. The diagonally disposed riflles 41 are shown in Fig. 4 as arranged over a greater portion oflthe deck surface than in the modified construc-.

tion of Fig. 5 and it will be noted that in Fig. 4 the rifiles 41 are disposed adjacent the feed hopper 31, whereas in Fig. 5 the longitudinally extending riflies 40 are disposed directly belowthe feed hopper. The number of the longitudinallyextending riflles 40 it is desirable to provide adjacent the concentrate wall 37 will depend largely upon the rapidity with which it is desired to advance the high grade concentrates lengthwise of the deck, having in mindthat a suflicient number of diagonally disposed rifiles 41 should be emplo ed to work the concentrates away from t e lower side of the deck.

The finer concentrates which are not caught by the relativelyfew longitudinally extending rifiles 40 will work down the transverselyinclined deck surface towards the lower side thereof, but in doing so most of the finer concentrates will be caught by the dia onally dis osed'rifiles 41 andwillbe directe up the eck surface by these inclined rifiles towards the concentrate wall until they reach the lon itudinally extending riflles 40 to travel lengt wise of the last men tioned rifiles until they esca e from the dischar end of the deck into t ereceptacle 42.

W ile the two sets of rifiiesiso far described work very effectively in. separating the values from the tailings, it is found that a further separation of the fine values'from the tailings'may be readily effected by providing an upstanding-wall 43 along the lower side of the deck to form a settling basin upon the deck surface in which the tailings are retained while they are sub jected to a panning action due to. the vibratory movement imparted to the deck. In

accordance with the present invention the tailings are caused to pile; up against the retaining wall 43 in a relatively thick bed, as indicated by X in Figs. 2 and 3, so that the concentrates remaining in these tailings may work downwardly into engagement with the deck surface whereupon they will be directed out from under the bed of materials bythe upwardly inclined rifiles 41. The material retaining wall 43 preferably extends a substantial distance along the lower side of the deck, as will be apparent from Fig. l, inorder to give the values within. the bed of tailings X ample time to work downwai'dl into engagement with the deck surface. he materials X resting against the retaining wall 43 may escape from the lower side of the deck'upon reaching the inclined discharge end 44 of the retaining wall.

From the foregoin" description when read in connection with the drawings it will be seen that the longitudinally extending'riffles 4O serve to separate the large or high grade values ra idly from the tailings, thus avoiding the anger of these large values being crowded out of the riflles further down the deck by the fine values wedging under the larger values. It will be seen that by using both the longitudinally extending r1iiles'4s0 and the diagonally disposed riflies 41 such concentrates as work down the deck near the lower side thereof will be directed up' the inclined deck surface, towards'the concentrate wall by the inclined riflles 4'1. Itwill also be seen that by'providing the basin construction above described the very fine values which might otherwise be discharged from the deck with the tailings" are saved by subjectlng the materials to a panning-action which causes these fine values to work down "underthe tailings into engagement with the inclined rifiles. The deck surface may havetheusual apertures 30 shown in Fig. 1 through which air is forced upwardly from the air chamber 33.

It is found that the longitudinally extending rifiles 40 will work satisfactorily upon a deck surface having arelatively steep transverse inclination, whereas the pitch or inclithe deck surface 1s toogreat, The present deck surface is thereforeshown as having that portion of the deck surface upon which the rifiles 40 are rovided bent upwardly at an increased ang e as at 45. The various features above described cooperate in a very satisfactory manner to produce a deck having a large, range of utility and which separates theconcentrates from the tailings with a high degree of efiiciency.

What is claimed is 1. A concentrator table," comprising in combination, a deck casing having a material supporting surface that is mounted at a transverseinclinationand having a concentrate wall that extends along the upper-side nation of that portion of the deck providedwith the Miles 41 is limited by the condition that the concentrates will not travel along the diag nally disposed riflies if theslope of of the deck, means for supporting the deck for vibratory movement, riflles provided upon the deck surface near the concentrate wall and arranged to extend lengtl'iwise of the deck at a slight angle to said wall to direct the concentrates against the concentrate wall for retreatinent, and other riliies provided upon the lower portion of the deck surface and arranged at an angle to the first mentioned riltles to direct concentrates up the inclined deck toward the first mentioned riflies.

A. concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at a transverse inclination and having a. concentrate wall extending along the upper side of the deck, rifl'les provided upon the deck surface near the concentrate wall and arranged to extend in the general direction of the concentrate wall and to direct the concentrates against said wall forretreat-merit, and other rifiles provided upon the lo er portion of the deck surface and arranged at an angle to the first mentioned rifl'les to direct concentrates up the inclined deck toward the first mentioned rii'lles and between different pairs of said rifl'les.

3. A concentrator table, comprising in combination, a deck casing having a mate rial supporting surface that is mounted at a transverse inclination and having a concentrate wall extending along the upper side of the deck, ri'ltles provided upon the deck surface to extend diagonally over said surface and arranged to direct the concentrates up the inclined deck surface toward the concentrate wall, and a series of ri'li'les interposed between said wall and the upper end of the diagonally disposed riitles and arranged to extend lengthwise of the de k at an angle to the diagonally disposed rifllcs and constructed to receive concentrates from the first mentioned riftles and direct them against the concentrate wall for retreatment.

1-. A concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at a transverse inclination and having a portion of the deck surface extending along the upper side of the deck bent upwardly to give the same a greater transverse inclination than the remaining portion of the deck surface, rifi'les mounted upon said upwardly bent portion of the deck surface, and other ritlies mounted upon the remaining portion of the deck surface at an inclination to the length of the deck and to said first mentioned ril'i'les and adapted to direct concentrates up the inclined deck toward the first mentioned rilhes.

5. A concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at a transverse inclination and having a con deck casing for vibratory movement, means for vibrating the deck in the direction of its length, rillies PIOVlClGClllPOIl that portion of the deck surface lying near the concentrate wall and arranged to direct the concentrates against said wall and also to slope downwardly across the path of deck movement inv a direction to cause the movement of the deck to work the concentrates across the channels between the ritl'ies toward the upper side of the channels, and other riliies provided upon the lower portion of the deck surface and extending diagonally over the deck surface to direct the concentrates up the deck surface toward said first mentioned riffies.

6. A concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at transverse inclination and having a concentrate wall extending along the upper side of the deck, inclined rillies provided upon the deck surface and arranged to direct the concentrates diagonally up the inclined deck surface away from the lower side of the deck, and other ril'lles provided upon the deck surface to direct the concentrates against different portions of the concentrate wall and arranged to extend lengthwise of the deck but with a slight downward slope toward the lower side of the deck.

7. A concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at a transverse inclination and having a concentrate wall extending along the upper side of the deck, means for supporting the deck casing and for vibrating it to advance the materials along the deck, a material retaining wall extending along the lower side of the deck and arranged to form upon the lower portion of the deck surface a settling basin in which the materials confined therein are subjected to a panning action as the deck is vibrated, riflies provided upon the upper portion of the deck surface to extend lengthwise of the deck and adapted to direct the concentrates lengthwise of the deck and against the concentrate wall for retreatment, and other ritiles arranged diagonally over the deck surface and adapted to direct the concentrates that settle in said basin out from under the tailings and up the inclined deck.

8. A concentrator table, comprising in combini. ion, a deck-casing that is supported for vibratory movement, means for vibrating the deck to advance materials along the same, a deck surface that is supported by the deck casing at a transverse inclination and having a concentrate wall extending along its upper side edge, a material ice retaining wall extending along the lower side of the deck and arranged to form a settling basin upon the deck surface in which a relatively deep bed of the materials is confined to subject the materials to a panning action as the deck is vibrated, riflles provided upon the upper portion of the deck surface and arranged to direct the larger concentrates rapidly along the deck and against the concentrate wall, and other rifiles extending diagonally of the deck surface and arranged to direct the concentrates that settled in said basin out from under the tailings and up the inclined deck.

9. A concentrator table, comprising in combination, a deck casing having a material supporting surface that is mounted at a transverse inclination and having a concentrate wall extending along the upper side of the deck, riflles provided upon the deck surface near the concentrate wall and arranged at a slight angle to said wall so that they terminate at successive points along the wall, and other rifiles provided upon the lower portion of the deck surface and arranged at an angle to the first mentioned rifiles so that they terminate at different points along said rifiles and serve to direct concentrates up the inclined deck toward the first mentioned rifiies.

In testimony whereof, I. have signed my name to this specification.

ALBERT H. STEBBINS. 

